74ACT258SJ

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74ACT258SJ is a quad 2-input multiplexer featuring 3-STATE outputs, designed for high-speed data selection applications. It belongs to the ACT series of CMOS logic devices, offering TTL-compatible inputs and robust output drive capabilities with source/sink currents of 24mA. The device operates within a supply voltage range of 4.5V to 5.5V and supports a wide operating temperature range from -40°C to 85°C. Packaged in a 16-pin SOIC format, it allows four bits of data from two sources to be selected using common data select inputs, facilitating efficient bus-oriented system designs.

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad configuration enabling simultaneous selection of four independent 2-to-1 data channels
• 3-STATE outputs providing flexible bus-oriented connectivity and isolation
• TTL-compatible inputs ensuring seamless integration with standard logic families
• High-speed performance characteristics suitable for demanding digital switching applications

Signal Switches, Multiplexers, Decoders Applications

• Data routing in computer systems and communication equipment
• Bus-oriented signal selection in embedded controllers
• Multiplexing functions in industrial control panels
• Signal path switching in test and measurement instrumentation

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify component authenticity through authorized distributors or certified suppliers. Confirm package integrity and pin alignment upon receipt. Check for RoHS compliance markings as specified in official documentation. Ensure storage conditions maintain static-safe environments to prevent electrostatic discharge damage. Review datasheet revisions for any updates regarding electrical specifications or handling instructions before implementation.

Signal Switches, Multiplexers, Decoders Selection Notes

Choose this component when requiring multiple independent multiplexing channels with tri-state capability. Consider the ACT series for improved speed over standard AC variants while maintaining CMOS power efficiency. Verify that the 16-pin SOIC package fits the target PCB layout constraints. Ensure supply voltage levels remain within the specified 4.5V to 5.5V range for optimal operation. Evaluate thermal requirements against the -40°C to 85°C operating range for the intended environment.

Signal Switches, Multiplexers, Decoders Part Context

This device is part of the widely adopted 74ACT logic family, known for balancing speed and power consumption. It serves as a functional equivalent to other quad multiplexers in the industry but offers specific drive strengths and interface compatibility defined by Fairchild's design parameters. The SJ suffix indicates a specific tape-and-reel packaging variant optimized for automated assembly processes.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct substitutes include the 74ACT258SC (SOIC-16) and 74ACT258PC (DIP-16) from the same manufacturer family. Cross-brand equivalents may exist but require verification of pinout compatibility and electrical parameter matching. Always consult updated datasheets to confirm functional parity before replacing discontinued or obsolete parts.